Hide global options for subcommands unless --verbose

[techtonik]

Rebased #4433, which got bitrotten again.

I just rebased it. Need more time to see how can I run pip from checkout to test that nothing is broken during rebase. https://pip.pypa.io/en/stable/development/ is pretty silent about that.

[techtonik]

Filled an issue about easy "development environment setup" #5747

[techtonik]

Figured out how to run pip from development source. Tests:

• pip, pip -h and pip help should show commands and general options
• pip help -h and pip help help should show subcommand help, its options, but no general options. Instead there should be a text message to specify -v to show those.
• show subcommand, its options and general options
  • pip help -h -v
  • pip help help -v

[techtonik]

Okay, this is broken right now.

$ python src/pip help help -v

Usage:   
  pip help <command>

Description:
  Show help for commands


Add '-v' flag to show general options.
There was an error checking the latest version of pip
Traceback (most recent call last):
  File "/home/techtonik/p/pip/src/pip/_internal/utils/outdated.py", line 106, in pip_version_check
    find_links=options.find_links,
AttributeError: Values instance has no attribute 'find_links'

[techtonik]

Looks like the problem is with current master. Removing /home/techtonik/.cache/pip/selfcheck.json fires up the bug in virtualenv as well.

[techtonik]

Ok. That's a duplicate of #5433. There is no problem with this PR - it is ready to be merged.

[techtonik]

This can be merged now.

[pradyunsg]

Thanks for rebasing this @techtonik!

There's #5399 for having a discussion on this specific topic so if there's consensus that this is the approach we want to take, we'll proceed. :)

[BrownTruck]

Hello!

I am an automated bot and I have noticed that this pull request is not currently able to be merged. If you are able to either merge the master branch into this pull request or rebase this pull request against master then it will be eligible for code review and hopefully merging!

[pradyunsg]

Thanks for filing this @techtonik!

This is still up for discussion but I'm gonna close this PR since it's bitrotten. We can continue the discussion on this on the issue and come back to this once we have a decision.